Straight up. I have to use windows @ work but I still require some
guidance.

I'm looking to append some pdfs. Pdftk
(http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/) works in the cmd
prompt.

Lets say I have
01_cool.pdf
02_cool.pdf

If I'm in cmd I can type

> pdftk *.pdf cat output combined.pdf
#=> A new file called combined.pdf which is the concatenation of the two
pdfs

I need to be able to run this in ruby because I would like to eventually
append all files that have the same names in two directories and put it
into one final directory. As a test this is the code I came up with.

pdfs = Dir["*.pdf"].sort.join(" ")
`pdftk #{pdfs} cat output combined.pdf`

Which results in an error: "No file or directory -pdftk ["01_cool.pdf",
"02_cool.pdf"] cat output combined.pdf

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